Merv 8 Mpr 700 Filtrete 20X25X5 Furnace Air Filter, Dust, Pollen,, Fits Lennox You run a tight ship at home, from floor to ceiling--and everywhere in between. Unfortunately, ordinary home non-electrostatic air filters aren?t super effective at capturing unwanted particles. GOOD NEWS : The unique design of the electrostatically charged Filtrete Dust, Pollen Pet Dander Air Filter attracts--and traps--more particles from your air through your heating and cooling system, making quality control a breeze. With each cycle through the filter, your indoor air becomes a little bit cleaner. THE HIGHER THE MPR, THE MORE PARTICLES - such as pollen, pet dander, baceteria and viruses - your filter will capture from the air passing through it ATTRACTS AND CAPTURES particles such as lint, pollen, dust, and pet dander FOR OPTIMAL PERFORMANCE of your heating cooling system or HVAC system, change your home air filter at least every 12 months for 4 in. and 5 in. filters A DIRTY FILTER WILL SLOW DOWN AIR FLOW and make the system work harder to keep you warm or cool--wasting energy. Sign-up for a filter change reminder program (www.filtrete.com/ChangeReminders) that works for you! CREATE A CHANGE COUNTDOWN in the Filtrete Smart App. Simply use the app to scan the barcode on your filter?s packaging, then choose 30, 60 or 90 days for your replacement countdown. When the lifespan is up, you?ll get a notification to change your filter OUTPERFORMS FIBERGLASS, WASHABLE AND NON-ELECTROSTATIC 3-month pleated 1 in. air filters for your furnace, air conditioner or HVAC system DESIGNED WITH EXCLUSIVE Filtrete Brand 3-in-1 technology from 3M to trap unwanted air particles while letting cleaner air flow through MPR 700 has a rating of MERV 8 FOR RESIDENTIAL use only